How to simply check are all elements in array same?

Question

I have an array with a random elements. How can I check, is all that elements the same or not? Could it be possible with numpy.all ? Thanks

Convert it to a set and check it is of size 1. Bah just beaten to it — Nick is tired, Oct 21 '17 at 14:08
I am not agree with marking this post as duplicated because it is related to ```numpy.array``` and not to the ```list```. And, yes, you could check identity with ```numpy.all(your_array == your_array[0])``` — Timofey Chernousov, Oct 21 '17 at 14:12
@TimofeyChernousov Unfortunately, it is such a basic question that I can't find a duplicate for it. I didn't read the question to the end, only the title and tags. — cs95, Oct 21 '17 at 14:21
@TimofeyChernousov: However, the first link I found without fail was the link to the np.all docs, which explicitly document this behaviour. If OP is not willing to put in that much effort to do a little research, this question doesn't deserve to be reopened. — cs95, Oct 21 '17 at 14:22

score 2 · Answer 1 · answered Oct 21 '17 at 14:09

2

You can use all:

if all(i == a[0] for i in a):   
   #all the elements are the same
   pass

You can also use a set:

if len(set(a)) == 1:
   #all the elements are the same
   pass

answered Oct 21 '17 at 14:09

Ajax1234

1 Answers1